High pressure oxygen aqueous phase catalyst demetallization
US4234452A · kind A · utility
7Cited by
5References
8Claims
0Family size
Assignee
Inventors
Key dates
| Filing date | Mar 26, 1979 |
| Grant date | Nov 18, 1980 |
| Priority date | — |
| Expiry date | Mar 26, 1999 |
Classification
- Technology area (CPC Y)Emerging Cross-Sectional Technologies
- CPC primaryY10S502/516
- WIPO fieldBasic materials chemistry
- WIPO sectorChemistry
Abstract
An improved demetallization process is disclosed comprising high pressure aqueous phase oxidation of a catalyst contaminated with a metal such as nickel, vanadium, copper and/or iron. The metal-contaminated catalyst can be oxidized in an aqueous phase at high pressure either before regeneration or subsequent to regeneration. Optionally, an oxidative and reductive wash can also be employed.
Source: USPTO / EPO open patent data. Objective bibliographic and citation counts.